US 11,755,147 B2
Display device having touch sensor
Min Jae Lee, Gwangju (KR)
Assigned to ACONIC INC., Gwangju (KR)
Appl. No. 17/632,451
Filed by ACONIC INC., Gwangju (KR)
PCT Filed Aug. 19, 2019, PCT No. PCT/KR2019/010484
§ 371(c)(1), (2) Date Feb. 2, 2022,
PCT Pub. No. WO2021/025221, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 10-2019-0096597 (KR), filed on Aug. 8, 2019.
Prior Publication US 2022/0276760 A1, Sep. 1, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G09G 3/3266 (2016.01); G09G 3/3275 (2016.01); H10K 59/40 (2023.01)
CPC G06F 3/04182 (2019.05) [G06F 3/044 (2013.01); G06F 3/04184 (2019.05); G09G 3/3266 (2013.01); G09G 3/3275 (2013.01); H10K 59/40 (2023.02); G09G 2300/0857 (2013.01); G09G 2310/027 (2013.01); G09G 2310/0278 (2013.01); G09G 2320/0276 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display device having a touch sensor, comprising:
a display panel including pixels connected to data lines and scan lines, each pixel having a light emitting element;
a scan driver configured to supply scan signals to the pixels through the scan lines;
a data driver configured to receive digital image data, convert the digital image data into an analog data signal, and supply the analog data signal to the pixels through the data lines;
a data variation calculator configured to obtain variations in image data for each data channel by using the digital image data, and calculate an integrated data variation value by adding up the variations in the image data for each data channel;
a plurality of correction value calculators configured to calculate a touch correction value for each sensing channel by using the integrated data variation value;
a touch sensing unit including driving electrodes and detection electrodes that cross each other;
a touch driver configured to supply a touch driving signal to the driving electrodes; and
a plurality of touch correction circuits configured to perform noise removal for each sensing channel by using detection signals received from the touch sensing unit and the touch correction value for each sensing channel received from the correction value calculators,
wherein the data variation calculator includes:
a variation detector configured to detect variations in image data for each data channel in a previous horizontal period and a next horizontal period by using the digital image data; and
a variation summer configured to calculate the integrated data variation value by adding up the variations in the image data for each data channel detected by the variation detector, and
wherein each of the correction value calculators includes:
a modulator configured to modulate the integrated data variation value;
an integrator configured to integrate the integrated data variation value received from the modulator for a preset period to calculate the touch correction value; and
a flip-flop circuit configured to receive the touch correction value and supply the touch correction value to a corresponding touch correction circuit in response to a sampling clock.